Abstract
The infrared thermography is an attractive tool for studying the fatigue behavior of materials. Based on two theoretical models of fatigue damage indicators, this work studied the fatigue properties of the virgin Ti- 6Al-4V alloy. According to the two damage indicators and the energy theory, the relationship between the macro-phenomenon and the micro-structural evolution during fatigue process was discussed. The fatigue limit of the titanium alloy was rapidly determined based on the measured temperature increment signals. The capability of the infrared thermographic method on the evaluation of fatigue properties was validated.
Highlights
I n practical applications, fatigue failure occurs everywhere including automobiles, airplanes, and vessels, etc
Meneghetti [11] defined a theoretical model in order to derive the specific heat loss per cycle from the temperature measurements during fatigue tests, and the fatigue strength of smooth and notched specimens was analyzed by this model
The purpose of the present work is to rapidly study the fatigue behavior of Ti-6Al-4V alloy by using different fatigue damage indicators provided by the infrared thermography
Summary
I n practical applications, fatigue failure occurs everywhere including automobiles, airplanes, and vessels, etc. The fatigue limit of the titanium alloy was rapidly determined based on the measured temperature increment signals. Some efficient methods based on the infrared thermographic analysis have been developed to correlate the temperature signal evolution with the corresponding fatigue parameter.
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